Texas Instruments UCC28221 Manuale utente

User’s Guide

UCC28221 200-W Evaluation Module

(EVM)

User’s Guide

EVM IMPORTANT NOTICE (CATEGORY B)

IMPORTANT: TI is providing the enclosed HPA035A evaluation module under the following conditions:

This evaluation module (EVM) being provided by Texas Instruments (TI) is intended for use for ENGINEERING

DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by Texas Instruments to be fit

for commercial use. As such, this EVM may not be complete in terms of design and/or manufacturing related

protective considerations including product safety measures typically found in the end−product incorporating

the module. As a prototype, this product does not fall within the scope of the European Union Directive on

electromagnetic compatibility and on low voltage and therefore may not meet the technical requirements of the

directive. This EVM is not subject to the EU marking requirements.

DShould this EVM not meet the specifications indicated in the User’s Guide the EVM may be returned within

30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE

WARRANTY MADE BY TI AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR

STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY

PARTICULAR PURPOSE.

DThe user assumes all responsibility and liability for proper and safe handling of the EVM. The user

acknowledge that the use of the EVM could present serious hazards and that it is the user’s responsibility

to take all precautions for the handling and use of the EVMs in accordance with good laboratory practices.

Please be aware that the products received may not be regulatory compliant or agency certified (FCC, UL,

etc.). Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate

precautions with regard to electrostatic discharge.

DNEITHER PARTY WILL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR

CONSEQUENTIAL DAMAGES.

DTI is currently dealing with various customers for products, and therefore our arrangement with the user will

not be exclusive.

DTI assumes no liability for applications assistance, customer product design, software performance,

or infringement of patents or services described herein.

DPlease read the User’s Guide and specifically the section in the User’s Guide pertaining to warnings and

restrictions prior to handling the product. This section contains important information regarding high

temperature and voltages which TI recommends to be read before handling the EVMs. In case of any doubt

regarding safety, please contact the TI application engineer.

DPersons handling the product should have electronics training and observe good laboratory practice

standards.

DNo license is granted under any patent right or other intellectual property right of TI covering or relating to

any combination, machine, or process in which such TI products or services might be or are used.

DThis Agreement is subject to the laws of the State of Texas, excluding the body of conflicts of laws and the

United Nations Convention on the International Sale of Goods, and will be subject to the exclusive

jurisdiction of the courts of the State of Texas.

DYNAMIC WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the maximum input voltage ranges specified in Table 1.

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM.

If there are questions concerning the input range, please contact a TI field representative prior to connecting

the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible

permanent damage to the EVM. Please consult the EVM User’s Guide prior to connecting any load to the EVM

output. If there is uncertainty as to the load specification, please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than 50°C. The EVM

is designed to operate properly with certain components above 50°C as long as the input and output ranges are

maintained. These components include but are not limited to linear regulators, switching transistors, pass

transistors, and current sense resistors. These types of devices can be identified using the EVM schematic

located in the EVM User’s Guide. When placing measurement probes near these devices during operation,

please be aware that these devices may be very warm to the touch.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

SLUU173A - October 2003 − Revised December 2003

4UCC28221 200-W Evaluation Module (EVM)

UCC28221 200-W Evaluation Module (EVM)

Mike O’Loughlin System Power

ABSTRACT

The UCC28221 EVM is a 200-W power converter that converts 36-V to 76-V dc input voltage to a

regulated 12-V dc output in a two-channel interleaved forward converter topology.

Contents

1 Introduction 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Caution 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Electrical Characteristics 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Performance 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Layout 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 List of materials 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Reference 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Introduction

The UCC28221 control device from Texas Instruments is used in a dual interleaved forward converter that

enables the power supply designer to reduce output current ripple and reduce magnetic size per power stage

allowing for improved transient response. The UCC28221 is a dual interleaved PWM controller with

programmable maximum duty cycle per channel up to 90% for interleaved forward and interleaved flyback

designs.

The power module has two isolated 100-W forward power stages operating at 500 kHz, which are operating

180 degrees out of phase with each other. This allows for smaller magnetic design and ripple current

cancellation on the output. The ripple current cancellation on the output allows for a larger allowable equivalent

series resistance (ESR) in your output capacitance.

The converter design also takes advantage of the on board 110-V internal JFET start up circuit of the UCC28221

that removes the need of an external trickle charge resistor for boot strapping. This circuit turns off after auxiliary

power is supplied to the device conserving power. This saves the power supply designer one component and

in high volume applications could be a considerable cost savings.

To correctly operate this EVM requires a minimum load of 50 W and a fan to keep the ambient temperature at

or below 40°C. Not keeping the EVM’s ambient temperature at or below 40°C could damage the EVM.

2 Caution

High voltage levels are present on this evaluation module whenever it is energized. Proper safety precautions

must be taken when working with this power module. Before handling, power must be removed from the EVM

and the input storage capacitance must be discharged below 50 V.

SLUU173A - October 2003 − Revised December 2003

UCC28221 200-W Evaluation Module (EVM)

2INA 7

OUTA

3GND

4INB

1N/C

VDD

OUTB

N/C

UCC27324D

+ +

Figure 1. Typical Application Schematic

SLUU173A - October 2003 − Revised December 2003

6UCC28221 200-W Evaluation Module (EVM)

3 Electrical Characteristics

Table 1.

MIN TYP MAX UNITS

VIN 36 48 76

Output 11.4 12 12.6 V

POUT 50 200 W

Output ripple 500 mV

4 Performance

Figure 2

EFFICIENCY

OUTPUT POWER

VOUT − Output Power −W

Efficiency−%

50 70 90 110 150 170 190

130

VIN = 36 V

VIN = 48 V

VIN = 76 V

CH. 3

100 mV/div

Figure 3

t − Time − 500 µs/div

OUTPUT RIPPLE VOLTAGE AT MAX LOAD

CH. 3 = VOUT

SLUU173A - October 2003 − Revised December 2003

UCC28221 200-W Evaluation Module (EVM)

Figure 4

CH. 3

1 V/div

t − Time − 500 µs/div

TRANSIENT RESPONSE WITH THE LOAD

STEPPED FROM 200 W TO 50 W

CH. 3 = VOUT

Figure 5

CH. 3

1 V/div

t − Time − 500 µs/div

TRANSIENT RESPONSE WITH THE LOAD

STEPPED FROM 50 W TO 200 W

CH. 3 = VOUT

4.4 A/div

CH. 2

4.4 A/div

CH. 1

4.4 A/div

Figure 6

t − Time − 1 µs/div

OUTPUT CURRENT RIPPLE CANCELLATION

(VIN = 36 V)

CH. 1 = IL2

CH. 2 = IL3

M = IL2 + IL3

4.4 A/div

CH. 2

4.4 A/div

Figure 7

CH. 1

4.4 A/div t − Time − 1 µs/div

OUTPUT CURRENT RIPPLE CANCELLATION

(VIN = 76 V)

CH. 1 = IL2

CH. 2 = IL3

M = IL2 + IL3

SLUU173A - October 2003 − Revised December 2003

8UCC28221 200-W Evaluation Module (EVM)

5 Layout

Figure 8. Top View

Figure 9. Bottom View

SLUU173A - October 2003 − Revised December 2003

UCC28221 200-W Evaluation Module (EVM)

6 List of Materials

The EVM list of materials is shown in Table 1.

Table 2. Evaluation Module List of Materials (HPA035)

REFERENCE QTY DESCRIPTION MANUFACTURER PART NUMBER

C1, C6 2Capacitor, ceramic, 1.0 µF, 16 V, X7R, 10%, 805 Std Std

C11, C12 2Capacitor, ceramic, 47 pF, 50 V, X7R, 5%, 603 Kemet C0603C470J5GACTU

C13, C15 2Capacitor, tantalum Chip, 47 µF, 16 V, 0.281 x 0.126 Vishay 595D476X9016C2T

C17, C18, C19, C20,

C21, C22 6Capacitor, ceramic, 1000 pF, 200 V, X7R, 10%, 1206 Vishay VJ1206Y102KXCA

C2 1 Capacitor, ceramic,0.47 µF, 50 V, X5R, 10%, 603 AVX 06036D474KAT

C23 1 Capacitor, ceramic, 0.01 µF, 500 V, X7R, 10%, 1206 Vishay VJ1206Y103KXEA

C24, C26, C27 3**Capacitor, OS−CON, 82 µF, 16 V, 40 mΩ, 20%, 8.3mm

(E7) Sanyo 16SVP82M

C28 1 Capacitor, ceramic, 0.01 µF, 25 V, X7R, 10%, 603 Kemet C0603C104K3RACTU

C29 1 Capacitor, ceramic, 680 pF, 16 V, X7R, 10%, 603 Std Std

C3 1 Capacitor, ceramic,180 pF, 50 V, X7R, 10%, 603 Std Std

C30 1 Capacitor, ceramic, 1 µF, 50 V, X7R, 20%, 1210 Std Std

C31 1 Capacitor, ceramic, 0.056 µF, 16 V, X7R, 10%, 603 Std Std

C32 1 Capacitor, ceramic, 0.1 µF, 50 V, X7R, 20%, 1210 Std Std

C33 1 Capacitor, ceramic, 0.47 µF, 16 V, X7R, 10%, 1206 Vishay VJ1206Y474KXJA

C4, C14, C16 3**Capacitor, MLP, 4.0 µF, 100 V ITW PAKTRON 405K100CS4G

C5, C25 2Capacitor, ceramic, 4.7 µF, 25 V, X7R, 10%, 1210 Vishay Std

C7, C9 2Capacitor, ceramic, 0.1 µF, 25 V, X7R, 10%, 603 Kemet C0603C104K3RACTU

C8, C10 2Capacitor, ceramic, 56 pF, 50 V, NPO, 5%, 603 Std Std

D1, D2, D13 3Diode, switching, 200 mA, 200 V, 330 mW, SOT23 Zetex BAS21

D12 1 Diode, zener, 9.1 V, 350 mW, SOT23 Diodes, Inc. BZX84C9V1T

D3 1 Diode, zener, 15 V, 350 mW, SOT−23 Diodes, Inc. BZX84C15

D4, D5, D6, D7 4Diode, schottky, 500 mA, 30 V, SOD123 ON Semiconductor MBR0530

D8, D9, D10, D11 4Diode, dual schottky, 20 A, 100 V, D2PAK/HS International Rectifier MBRB20100CTTRL

HS1, HS2, HS3, HS4,

HS5, HS6 6**Heatsink, surface mount heat sink, D2pak Aavid 573300

J1, J2 2Terminal block, 4 pin, 15 A, 5.1 mm, 0.80 x 0.35 OST ED2227

L1 1 **Inductor, SMD, 470 µH, 62 mA, 26 mΩ, 0.177 x 0.126 TDK NL453232T−471J

L2, L3 2**Inductor, SMT, 3.2 µH, 18 ARMS, 6.8 mΩ, 0.51 x 0.51 IHLP−5050FD−

RZ−3R3−M−01

Q1, Q2 2MOSFET, N-channel, 200 V, 0.030 Ω, D2PAK/HS VISHAY SUM65N20−30

SLUU173A - October 2003 − Revised December 2003

10 UCC28221 200-W Evaluation Module (EVM)

REFERENCE QTY DESCRIPTION MANUFACTURER PART NUMBER

R1 1 Resistor, chip, 15.0 kΩ, 1/10 W, 1%, 805 Panasonic ERJ−6ENF1502V

R12, R14 2Resistor, chip, 1 kΩ, 1/16 W, 1%, 603 Panasonic ERJ−3EKF1001V

R13, R15 2Resistor, chip, 5.23 Ω, 1/8 W, 1%, 1206 Std Std

R16, R17 2Resistor, chip, 100 Ω, 1/10 W, 1%, 805 Std Std

R18, R19 2Resistor, chip, 5.23 Ω, 1/10 W, 1%, 805 Std Std

R2 1 Resistor, chip, 22.6 kΩ, 1/10 W, 5%, 805 Std Std

R20, R21 2Resistor, chip, 0 Ω, 1/10 W, 5%, 805 Std Std

R22, R23 2Resistor, chip, 10 kΩ, 1/10 W, 1%, 805 Std Std

R25, R26, R27, R28,

R29, R30, R31, R32 8Resistor, chip, 7.5 Ω, 1 W, 5%, 2512 Std Std

R3 1 Resistor, chip, 604 kΩ, 1/10 W, 1%, 805 Panasonic ERJ−6ENF6043V

R33, R34 2Resistor, chip, 499 Ω, 1/8 W, 1%, 1206 Panasonic

R35 1 Resistor, chip, 3.57 kΩ, 1/16 W, 1%, 603 Std Std

R36 1 Resistor, chip,5.23 kΩ, 1/16 W, 1%, 603 Std Std

R37 1 Resistor, chip, 1.37 kΩ, 1/16 W, 1%, 603 Std Std

R38 1 Resistor, chip, 100 kΩ, 1/16 W, 1%, 603 Std Std

R4 1 Resistor, chip, 20.0 Ω, 1/8 W, 1%, 1206 Panasonic ERJ−8ENF10R0V

R5 1 Resistor, chip, 24.9 kΩ, 1/10 W, 1%, 805 Panasonic ERJ−6ENF2492V

R6, R24 2Resistor, chip, 750 Ω, 1/16 W, 1%, 603 Std Std

R7 1 Resistor, chip, 15.4 kΩ, 1/10 W, 1%, 805 Std Std

R8 1 Resistor, chip, 976 kΩ, 1/10 W, 1%, 805 Panasonic ERJ−6ENF9763V

R9 1 Resistor, chip, 5.36 kΩ, 1/10 W, 1%, 805 Std Std

T1, T2 2**Transformer, current sense, 10 A, 500 kHz, 1:50, 0.330

x 0.360 Pulse P8205T

T3, T4 2**SMT transformer, 2 Primary, 1 Secondary, 500 kHz,

103 W, LMAG = 35 µH, 0.787 x 0.984 Payton 50863

TP1 1 Adaptor, 3.5 mm probe clip ( or 131−5031−00), 0.2 Tektronix 131−4244−00

U1 1 Dual Interleaved PWM Controller With Programmable Max

Duty Cycle, SO16 TI UCC28221D

U2 1 High Speed Low Side Power MOSFET Driver, SO8 Texas Instruments UCC27324D

U3 1 Optocoupler, SO8 Motorola MOC206

U4 1 Adj Shunt Regulator, 100 mA, 36 V, SO8 TI TL431AID

−− 1 PCB, 0 In x 0 In x 0 In Any HPA035

NOTES: (1). These assemblies are ESD sensitive, ESD precautions shall be observed.

(2). These assemblies must be clean and free from flux and all contaminants. Use of no clean flux is not acceptable.

(3). These assemblies must comply with workmanship standards IPC−A−610 Class 2.

(4). Reference designators marked with an asterisk (’**’) cannot be substituted. All other components can be substituted with equivalent

MFG’s components.

7 References

Datasheet, UCC28220/1 Dual Interleaved PWM Controller with Programmable Maximum Duty Cycle, TI

Literature No. SLUS544

Indice

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